Introduction Hanoi, January 2009 The entire world has just said good-bye to the year of 2008 with a heavy mood. Everyone welcomes the new spring with decisions of tightening expenditure to deal with the economic crisis evaluated as the biggest crisis since the industrial big slump in 1930s of last century. In 2008 securities index in our country reduced over 60% and average reduction in the world was 40%. Low economic yield and unemployment increase are popular situation in all countries, so the governments must issue the huge demand stimulating packages to save the economy. This economic crisis can last until 2010 and cause serious damage to many countries in the world. The surprised thing for everyone is that the crisis happened quickly and strongly, but at the beginning of the year 2008 nobody received any official warning on the economic crisis, only a credit crisis rising from substandard lending in America. In the middle of the year 2008 we were known about a global financial crisis happening and in the last months of the year 2008 everyone was witness of a global economic crisis at serious level. Was the theoretical models in economics backward than the reality? Or at least they had many big gaps and macroeconomic analysis became indefinite. Therefore, economists must spend much time and effort to make the subject of economics become the scientific subject which grasps every movement of the economy. So, any new creation of professional researches or amateur researches in the field of economics has high referent value and event character. In this book, besides the contents with general features on economics, each chapter mentions to remarkable new matters at micro level and macro level of market economy. In chapter 1, we can find a method of defining the commodity value according to a new logic; in chapter 2, you have reason to worry about a economic model without progress; in chapter 3, we make acquaintance of general macroeconomic index and two solutions of regulating the economy; in chapter 4 - the final chapter - this chapter can make a strong impression on readers by a proposal on the currency policy without antecedent in the reality. Moreover, through this book, some important concepts in the economics described briefly and concisely help readers easy to approach.